CD4021BNSRE4

Shift Registers Overview

The CD4021BNSRE4 is an AC CMOS octal 3-state static shift register manufactured by Texas Instruments. It belongs to the CD4000 series and features serial-to-serial/parallel data conversion capabilities. The device operates within a supply voltage range of 3 V to 18 V and supports a maximum clock frequency of 24 MHz at 5 V. It functions across an extended temperature range from -55°C to +125°C. Packaged in a 16-pin SOIC (SOP) surface-mount format, it includes three-state outputs for bus-driven applications.

Shift Registers Feature Summary

• Provides serial input to parallel output data conversion using static latch technology
• Features three-state outputs compatible with microprocessor buses
• Supports direct clear function for synchronous or asynchronous reset operations

Shift Registers Applications

• Industrial control systems requiring data latching
• Microprocessor interface circuits for peripheral expansion
• General-purpose shift register applications in consumer electronics

Shift Registers Procurement Notes

Verify the complete part number including the E4 suffix to ensure compliance with lead-free manufacturing standards. Confirm that the SOIC-16 package dimensions match your PCB footprint requirements. Check for RoHS directive compliance documentation prior to integration into regulated products. Ensure operating conditions remain within the specified voltage and temperature limits to maintain signal integrity.

Shift Registers Selection Notes

Select this component when designing systems requiring reliable serial-to-parallel conversion with high noise immunity. The wide supply voltage range allows compatibility with various logic families. Consider the 24 MHz speed rating for timing-critical applications. Verify that the three-state output capability meets your bus isolation needs compared to standard logic gates.

Shift Registers Part Context

This part is a specific variant of the CD4021B family, distinguished by its tape-and-reel packaging and lead-free construction. It serves as a fundamental building block for digital logic designs within the broader 4000-series CMOS ecosystem. The device complements other Texas Instruments logic ICs such as counters and gates for complex system architectures.

Shift Registers Replacement Considerations

The CD4021BNSR is the non-lead-free equivalent. Other manufacturers offer pin-compatible alternatives like the MC14021B, though electrical characteristics may vary. Always consult official datasheets before substituting components to ensure functional equivalence.